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Task: Implement a JavaScript "startsWith" Utility

Task: Implement a JavaScript "startsWith" Utility: a task in Terminal-Lego-15k (Harbor dataset). Create a JavaScript module that implements a startsWith function to check if a string begins with another string. The implementation should work as a custom polyfill-style function (not simply…

The task

Create a JavaScript module that implements a `startsWith` function to check if a string begins with another string. The implementation should work as a custom polyfill-style function (not simply delegating to the native `String.prototype.startsWith`) and handle various edge cases.

Part of PrimeIntellect/Terminal-Lego-15k.